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![]() The width (W) was defined as the distance between the proximal and distal parts of the myometrium of the anterior uterine wall measured at the surface of the endometrium/endocervix of the posterior uterine wall. The depth of the hypoechoic triangle (D) was defined as the distance between the surface of the endometrial/endocervical layer of the posterior uterine wall to the tip of the hypoechoic triangle. In cases that had a hypoechoic triangular space in the lower part of the scar, the depth (D) and width (W) of the niche were also measured. In cases with completely healed CS scars, only this parameter was measured. Thus, RMT represents the thickness of the myometrial layer at the site of hysterotomy. The residual myometrial thickness (RMT) was defined as the distance between the tip of the hypoechoic triangle and the surface of the anterior uterine wall. The scar was identified in the sagittal transection of the uterus. For standardization purposes here we used the terms that were introduced by Naji et al. To assess CS scars we used a procedure described in our previous publications. All the ultrasonographic measurements were performed by single operator (M.P.). Both ultrasound devices were equipped with a 4–9 MHz transvaginal probe that allowed proper visualization of the CS scar. Ultrasound examinations were performed using a Medison SonoAce 8000SE or, beginning in 2007, using a Voluson 730 Pro (General Electric Medical Systems). |
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June 2023
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